Add OpenTofu setup and configuration for AWS infrastructure

- Create action for setting up OpenTofu environment
- Update Terraform workflow to use OpenTofu for infrastructure management
- Modify backend configuration for S3 with new bucket and region
- Add S3 bucket resources with lifecycle configuration
- Update local variables and remove deprecated files
- Include required Python packages for OpenTofu

terraform/aws-iac/variables.tf

@@ -1,4 +1,4 @@
 variable "region" {
   description = "AWS Default region"
-  default     = "us-east-1"
+  default     = "eu-west-1"
 }